Pencil-sharpener



"(No Model.)

P. O-DELL & E. SMITH. PENCIL S'HARPENBR. a

No. 491,129. w Patented Feb. 7, 1893.

WITNESSES:

UNITED STATES PATENT OFFICE.

ALBERT P. ODELL AND NED E. SMITH, OF BRADFORD, PENNSYLVANIA.

PENCIL-SHARPENER.

SPECIFICATION forming part of Letters Patent No. 491,129, dated February'7, 1893. Application filed April 23. 1892. Serial No. 430,434. (Nomodel.) 7

T0 at whom it may concern.-

Beitknown thatwe, ALBERT P. ODELL and NED E. SMITH, of Bradford, in thecounty of McKean and State of Pennsylvania,have invented certain new anduseful Improvements in Pencil-Sharpeners; and we do hereby declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it pertains tomake and use it, reference being had to the accompanying drawings, whichform part of this specification.

Our invention relates to improvements in pencil sharpeners; and itconsists in certain novel features of construction which will be fullydescribed hereinafter and particularly pointed out in the claims.

The object of our invention is to provide a cutter which is providedwith one or more spiral cutting edges, whereby the breaking of thepoints of the leads is prevented, and to secure these cutting edges ofknives in a cap to fit over the end of a lead pencil.

In the accompanying drawings:Figure 1 is a side elevation of apencilshowing ourinvention applied thereto. Fig. 2 is a vertical section ofthe cap in which our invention is placed, the same being shown attachedto the upper end of a pencil. Fig. 3 is an enlarged detached View of theknives. Fig. 4 is a side view of the upper end of a pencil, to which ourinvention is applied. Fig. 5 is an enlarged detached vertical section ofthe cap in which the knives are placed. Fig. 6 is a detached view of oneof the knives alone. Fig. 7 is a horizontal section taken on the line00-03 of Fig. 5.

A indicates an ordinary lead pencil, to the upper end of which isattached a metal tube 13. This metal tube B is provided with a righthanded screw thread D at its lower end, and with a left handed screwthread 0 at its upper end. The lower end of this tube is screwed uponthe upper end of the pencil, and an erasing rubber E is placed in theupper projecting end of the said tube.

Our invention consists of a cap F that is provided at itslower end witha screw threaded portion that fits over the upper screw threaded portionof the tubeB as illustrated. At opposite sides of this cap it is split,and

through thistube or ring thepoint of the penoil will extend as the woodis cut away.

The knives consist of two pieces M which have their edges cut in spiralform as shown, and one edge of each piece M is sharpened to form a knifeedge P. The lower ends of these knives are secured together by means ofa ring N, and this ring Nis secured in position in the cap F byindenting the said cap from the outside and forcing the metalthereofinto slots a formed in the ring N or in the knives, thuspreventing the knives from having any turning movement, and securingthem in position. As shown in Fig. 3 the adjacent edges of the knivesare separated to form an opening between them, and the upper pointedends S of the knives or blades M extend into the ring or short tube I atthe upper end of the cap B and are thus held in their proper position,and prevented from separating when the pencil is forced between theknives to be sharpened.

By means of the above described construc- I tion we produce a simplepencil sharpener which will sharpen pencils very quicklyand withoutbreaking the points of the leads, which is a common defect of all pencilsharpeners.

Having thus described our invention, what we claim and desire to secureby Letters Patcut is:

.1. A pencil sharpener comprising a vertically slotted tube, two spiralknives project: ing upward in said tube and so arranged in relation toeach other as to form spaces between their adjacent cutting edges and aband for securing together the knife sections at their lower ends,substantially as shown and described. 7,

2. A pencil sharpener comprising a cap having openings for the passageof shavings, and two knives with spiral cutting edges, the said knivestapered to a point, and constructed with a space between the adjacentedges thereof, substantially as described.

3. A pencil sharpener comprising a cap having openings for shavings, twoknives secured at their lower ends to the inner side of the said cap, aring at the top of the cap, the knives formed into a point at theirupper ends which extend into the said ring, and an opening in the top ofthe cap opposite the ring, substantially as set forth.

4. Apencilsharpener comprisingtwo knives secured at their lower ends,having spiral cutting edges, the knives formed to a point at their upperends and to form spaces between 15 the adjacent edges thereof,substantially as specified.

In testimony whereof weaffix our signatures in presence of twowitnesses.

ALBERT P. ODELL. NED E. SMITH. Witnesses:

ED. F. MCINTIRE, G. B. MOOALMONT.

